Pharmaceutical compound.



45 v "Incarry ngout FRITZ \H'OFMANN, OF ELBERF'ELD, FABRIKEN' OFELBERFELD o0.

TlOll OF YORK;

GERMANY, ASSIGNOR To FARBEN-7 on NEW YORK,- N. Ya A GORPORA-PHARMACEUTICAL COMPOUND.

Specifieation of Letters Patent.

Patented'J'une ,19oe. 1

'- Application filed December 9, 1905. Serial No. 291,056.

To all whom it may concern."

, Be it known that'iI, Farr HO-FMANN, doctor of philosophy, chemist,residing at Bismarkstrasse 23, Elberfeld, Germany, (assignor to theFARBENFABRIKEN, 0F. ELBERFELD 00.;

of NewYork,) have invented anew and useful Improvement .in a Nev:PharmaceuticalCom- Y I gound, andl hereby declare the following to eaclear and exact description of nlyinven v v "tion.

' Lhave found that the hitherto. unknown of the b'enzoyl derivative ofbeta-ethyltetra nethyldiaminoglycerin ofzthe is a valuable localanesthetic;-

j The newcol'n'oundcan beobtained hy treating heta-et yl lye and/thenconverting the formula:'

erin with benzoyl V sultlng com; pound into its mononitrate;

It may beremarked that theabove mentiohedbeta 11-ethyltetramethyldiaminoglyc-- erin can be-obtained' by the action ofdimethyl- \aminon betaethyldichlorhydrin of .the

which can be produced byj-the ie 3 'tion of die oracetone on ethylmagnesium" bro'niid dissolved etherand decompositionof the magnesium comun water o acids: 1117, Process pmfi n I can li epa t be g by and PP n-mmm,

condenser,- a st rrer, 7

arts of magand "containing forty-eight nesium fi ings-shrew Wi hstrik oA traniethyldiaminoglym hl'oridand caustic -soda and eighteen parts ofeth l 'bromid and Water and alcohol,) a mixture of two hundred threehundred partsof et or isxdropped 4 While .cooling. A reaction sets in. f,The mgtal roduction of an dissolves with the tional compound ofe'formula:

' .ozue-o-cznfi;

To the solution thus obtained two hundred and fifty-four parts ofdichloracetone dissolved in other are added while cooling and stirring.I After" about twelve hours icewater, and then sucli 'a. quantity ofdilute sulfuric acid is'added a s'will be necessaryto dissolvetheprecipitated magnesium comound. e ethereal solution is separa om thewater; dried, and concentrated on the water-:bathL By distillation ofthe residue in oacuothe beta ethyldichlorhydrin 118V? ing theabove-given formula isobtained.- It is a colorless oil, boiling at 77centigrade under a pressure-offifteen millimeters.

' In an autoclaveamixture'of one-hundred and fiftyseven partsofjbeta-ethyldichlor" hydrin thus obtained one hundred-and eighty artsof dimethylamin and'sixlhundred parts ofwater-jis heated to 180centigrade'for about three hours. The resultingji id i f-thenacidulat'ed.

'th hydrochloricacid and extractedwith ether several times. The acidsolution is then evaporated-to dryness on-the Water-bath and; the.residue mixed with ether and decomposed b the'addition of concentratedcaustic-soda" e. The ethereal ltetramethyldisolution oi the beta -etylamin thus obaminoglycenn and the dimet tained 1s dried over causticpotash. The ether and the dimethylamin are driven off parts of benzoyicniorld on cooling by the ad,-

; dition' of ice" to the reaction mass, which is then extracted withether.

the residue thus obtained ismixed with such a quantity of nitric acid 1as corresponds with one molecule'of NO H. After evaporation p todryness. the resulting salt is crystallized from acetone.

I The mononitrate of ben'zoyl beta ethylsolubleinwater. and acetone.

- Solutions of he new compound are employed in medicine-in the mannerknown and 3 ='1n use iior local anesthesia.

' lwhat I claim as.new,

'fHaVmg. novv described my inventionand in What manner-the same is to beperformed, and desire to secure by Letters Patent, is-

-' The herein-described new mononitrate' of" The ethereal sov lution isdried, the ether is distilledofi', and

the ben zoyl derivative of beta-ethyltetr'zi methyldiaminoglycerinhaving the formula:

forming White crystals melting at 162 centigrade after'being dried at100 Centigrade which are soluble in water and in acetone, and being avaluable: local anesthetic, substantially as described. I In testimonywhereof I have signed my name in the presence of two subscribingWitnesses.

FRITZ HOFMANN.

" Witnesses:

OTTO Kome, J. AJRITTERsHAUs

